518 University of California Publications in Botany [Vol.8 



medullary cells thin walled, closely joined, the length and breadth 

 dimensions greater than the cross-dimensions, containing a few disk- 

 shaped chromatophores ; zoosporangia numerous, promiscuously scat- 

 tered among the gametangia on both surfaces of the frond; game- 

 tangia very numerous, closely congested at times or scattered without 

 order ; projecting hairs very delicate, in small groups, early deciduous. 



Growing on Phyllospadix. Pacific Grove, California. 



Setchell and Gardner, Phyc. Cont., 1924, p. 3. 



This species is apparently not abundant, however the plants are 

 small and inconspicuous, and quite probably ephemeral. Of all of 

 our species, thus far discovered, this one fruits most abundantly. The 

 larger part of the surface cells become transformed into reproductive 

 cells. The type, as stated above, comes from Pacific Grove, but we 

 have two other collections from our territory, viz., growing on Phyl- 

 lospadix at Victoria (Gardner, no. 38496) and one from San Pedro 

 (Mrs. H. D. Johnston, Herb. Univ. Calif., no. 99456) on Zostera which 

 may be referred here, at least provisionally. 



2. Punctaria fissilis S. and G. 



Fronds fragile and flabby, ligulate, 12-15 cm. high. 10-16 mm. 

 broad, 65-70/i. thick, tapering at the base to a very delicate distinct 

 stipe 10-14 mm. long, attached by a small parenchymatous disk, light 

 brown in color, more or less deeply lacerated into linear laciniae, com- 

 posed of four layers of cells of fairly uniform size arranged in more 

 or less longitudinal rows, with thin walls and very small disk-shaped 

 chromatophores arranged closely along the walls; zoosporangia and 

 gametangia unknown ; hairs present in small groups. 



Port Clarence, Alaska. 



Setchell and Gardner, Phyc. Cont., VII, 1924, p. 4. 



The flaccid nature of the fronds, the long, delicate stipe, their 

 laciniate habit, the arrangement of the cortical cells in fairly regular 

 longitudinal rows along with the other combination of characters, 

 characterize this as a distinct species. P. fissilis seems to have its 

 nearest relations with P. glaciate Rosenv. and P. plantaginea (Roth) 

 Grev. We have not been able to examine any of the material from 

 Yakutat Bay collected by Saunders and reported under P. plantaginea 

 (1901, p. 420). We have not seen any typical P. plantaginea from our 

 territory and suspect that possibly his P. plantaginea may be found 

 to belong to P. fissilis. 



